This Part Fits the following kits / parts:

#120019 - HPI SS-30MGWR SERVO (WATER-RESISTANT/6.0V/8KG/METAL GEARED)

This water-resistant metal geared servo is ideal for bashers and
racers looking for a tough and durable servo that can be used in
wet conditions (e.g. rain, snow, puddles). Please note, not
suitable for submersion.

NOTE: This servo is water-resistant only,
meaning it is resistant to splashes and brief contact with water.
It is not waterproof and therefore not suitable for submerged used.
Before driving in wet conditions, make sure that all electronics
fitted to the vehicle are safe to use (marked as water-resistant or
waterproof), or that they are fully enclosed and protected from
water and moisture (such as in a sealed receiver/battery case).
Fans mounted on speed controllers are not water resistant - we
recommend to disconnect the fan from the ESC before driving in wet
conditions and allow it to dry fully before reconnecting the fan
power. Lubricate exposed metal drivetrain parts such as
bearings, outdrives and diff shafts before driving in wet
conditions. Motors are not intended for submerged use and may be
damaged if used when under water. After driving in wet conditions,
make sure to rinse off dirt and any corrosive liquids like
saltwater with plain water and re-lubricate metal drivetrain
parts.